its the same as : link

with of course a bit of twist, here you can only minus

who last longer:
From 100 points
-1 to 1 soshi
1.
2.
3.
4.
5.
6.
7.
8.
9.

From 200 points
-2 to 2 soshi
1.
2.
3.
4.
5.
6.
7.
8.
9

From 300 points
-3 to 2 soshi
1.
2.
3.
4.
5.
6.
7.
8.
9